Update one Array from another in a Function ('T_DOUBLE_ARROW' error)

Question

I'm getting a (T_DOUBLE_ARROW) error with the below function.

I'm trying to update the field booking_number from an array called $details. This is being updated from the contents of another array based on two arguments.

I get the feeling that it's something small and stupid. Think I've been staring at the code for too many hours!

Can anyone help? Would be much appreciated!

function addBookings($details, $bookings, $fulldate){
    foreach($bookings as $booking){
        if(($booking['class_id'] == $details['id']) && ($booking['class_date'] == $fulldate)) {
            $details['booking_number'] => $booking['booking_number'];
        }
    }
    return $details;
}

Answer 1

I think what you want there is =, not =>.